Packer head



Aug. 27, s1929. w. w. FRY

PAckER HEAD Filed Aug. 5. 192e F7 fla /I 2 Sheets-Sheet l Aug. 27, 1929.

fit/d?? W. W. FRY

PACKER HEAD Filed Aug. 5 1926 2 Sheets-Sheet 2 Patented Aug. 27, 1929.

PATENT OFFICE.

WILLIAM W. FRY, OF LOS ANGELES, CALIFORNIA, ASSIGNOR OF ONE-HALF TO yROBIEN- SON IACKER COMPANY, OF TULSA, OKLAHOMA, A CORPORATION OF OKLAHOMA.

IPACKER HEAD.

Application led August 5, 1926. Serial No. 127,372.'

This invention relates to improvements in packer heads to. be'attached to strings of casing, to be used in the casing of oil wells or the like, which strings are inserted 1n casings of lar er diameter.

ne of the objects of the invention is to provide a device of this character with means to be engaged 4by an inserting or extracting tool, so that the string of casing to which the packer head is attached may be raisedor lowered through the instrumentality of the tools, at the will of the operator.

Another object of the invention is to furnish a device of this character, adapted when the string of casing is set, to securely pack the space between the smaller casing and larger casing whereby any oil, gas or water can only issue from the well by passing through the-packer head.

A further object is to furnish such a device with an annular beveled face at its upper end, designed to function as a seat for a valve, when the device is employed as a flow packer. When the packer head is inserted in the well, a flow pipe with a valvesurrounding the saine may be inserted in the well and lowered to the point where thevalve engages the beveled face on the packer head, and as a result of this, all fluid in the larger casing below, 'will ow upward through the small pipe, producing-a nozzle effect, and thus obtaining a higher elevation of the fluid in the hole, 4from the pressure below.

A still further object is to provide apacker head with means at its upper end to be automatically engaged or disengaged by an inserting or extracting tool, after the packing head has been set in position. Usually, in the course of sinking a hole, the operator finds it necessary, at certain times, to under-raam, and at such times, he must pull back the string of casing to permit this. Should the operator desire to move the string of casing after he has once set it in the well, the ex- 45.- tracting tool is lowered until it engages the recesses at the upper portion of the packer head, and when the operator lifts on the packe-r head, it releases the .packing fr om the outer casing, so that the string of casing may be raised. The packer head, forming the subject matterof the present invention, readily permits such an operation to take place.

Another object of the invention is to provide a packer head of simple and inexpensiveconstruction which may be used indefinitely,

the upper end of the casing which lis locatedi in the casing of the well.

Fig. 2 1s an enlarged vertical sectional view of the upper portion ofl the casing and the packer head. Y V

Fig. 3 isa horizontal sectional view taken on line 3 3 of Fig. 2.

In the drawing, 1 designates the well casing in which is located the casing 2, screwed at its upper end, as shown at 3, to the reduced skirt 4 ofthe enlarged sleeve 5, which forms the lower part of the telescopic packer head.

The upper end of the sleeve 5 is threaded at4 6 to a ring 7, the latter being provided with a plurality of recesses 8, each of which has a downwardly and outwardly extending sur,- face 9, and a horizontal surface 10.

Slips 11 are arranged infthe recesses 8, and each slip is of'triangular formation in vertical section, and provided on its inner surface with teeth 12, which cooperate with teeth 13 on the inner sleeve 14 of the packer head.

This sleeve has an outwardly extending flange 15 at its lower end which abuts vagainst the collar 7 when the packer head is lifted, and bears the weight of the string of casing 2. The upper end of the sleeve is threaded at 16 to the upper portion 17 of the packer head. The lower surface'18 of the part 17, and the upper surface 19 of the collar 7, form abutments or shoulders against which the rubber packin rings 2O bear; these packing 'rings surroun ing the sleeve 14 and being.

adapted when the surfaces 18 and 19 move toward each other, to expand outwardly aga-inst the inner surface of the casing 1 for packing off oil, gas or water.

The part 17 of the packer head is provided with an internal annular recess 21 having a downwardly and inwardly extending curved face 22 and a horizontal lface 23. An inverted channel 24 merges into the face 23 and is adapted to receive projections on the slips of the inserting or extracting' tool not shown, for the purpose of preventing splitting of the part 17 due to wedging action by the insert- `ing or extracting tool.

he upper end of the part 17 is provided with an internal annular beveled surface-25 adapted, when the device isused as a flow packer to function as a valve seat for a valve 26, the latter being fixed on a narrow pipe 27 which may be lowered into the well for the purpose of raising the fluid under the pressure existing in the well.

The packer head and the string of casing 2, when the pipe 27 and valve 26- are not in the well, may be raised or lowered by a special tool,v which is not illustrated herein. This tool is designed to engage the recess 21, and when the string of casing has been lowered to the bottom of the well, the sleeve 5 'of the packer head will be halted, but the sleeve-14 with the inserting tool willcontinue to lower under the influence of theV weight of the tool, and this will cause the rubber packing 2O to expand against the casing 1. During this expansion, the slips 11 ride over the teeth 13 of the sleeve 14, and after the parts 14: and 174 have reached the maximumO loweredposition, these slips will interlockwith the teeth 13 and prevent the sleevey 14 from rising under the influence of the rubber packing 20, after the weight of the tool hasbeen released from vthe part'17. Consequently, the packing will remain expanded after the^tool .is withdrawn and will thus pack the well.

F When it is desired to raise thel string of casing 2 and the packer head, the extractingy tool may be again lowered into the well until it engages the recess 21, and then, by agitating the part 17, the slips 11 are caused to disengage the sleeve 14, so that the packing 20 is released and the flangen 15 comes into engagement with the collar 7 for lifting the string of casing and packer head by the tool.

What is claimed and desired to. be secured `by Letters Patent is 1. A packer head 'including a lower large amazesv sleeve adapted to be connected to ai ystring of casing, a collar detachably connected to the f large sleeve and having a plurality ot re- 50 cesses therein, an upper annular member, an inner' sleeve secured to the upper member anu having a flange at its lower end to engage said collar, a resilient packing ring surrounding. the inner sleeve, radially movable slips arranged in said recesses, and coacting teeth on the slips and inner sleeve for'locking the sleeves in various adjusted positions. 2. A packer head -including an upper annular member, an inner sleeve having its upper, end connected-to the upper member, a`

`fixed flange on the lower end of the inner sleeve packing rings surrounding the sleeve and bearing against said upper member, a collar engageable with said flange surrounding said sleeve and bearing against said packing rings, said collar being provided :with recesses, each recess having la downwardly and outwardly extending. surface and a substantially horizontal surface, radially` movable slips arranged in' said recesses, each slip bemember, an inner sleeve secured to the upper member andy adapted toengage the rst mentioned member, a resilient packing ring surrounding the inner sleeve, said recess having a downwardly and outwardly extending surface, a radially movable slip arranged in said recess and co-acting with the inner sleeve 90 for locking the'- sleeve in various adj usted positions.

i WILLIAM W. FRY. 

